Lanthanides and Actinides are placed separately as the properties of these elements is quite different from the elements in Periodic Table.
Rare Earth elements or lanthanides are placed in the period 6 of the periodic table of Mendeleev. Actinoids are placed in the period 7 of the periodic table of Mendeleev.
The periodic table of elements is a chart that organizes the elements and emphasizes their shared traits and commonalities. All the known elements and their atomic number are on the periodic table.
The elements that have been removed from period 7 and placed below the periodic table are called the "lanthanides" and "actinides". These elements are also known as the "rare earth elements" and they are placed separately to conserve space on the periodic table.
The first period is at the top of the table. It consists of hydrogen and helium. The bottom period is period 7.
The two rows at the bottom of the periodic table are taken out to make the table more compact and easier to read. These two rows are known as the lanthanides and actinides series. They are removed and placed below the main table to avoid making the entire table wider than it is tall.
Actinides
Lanthanides and actinides are placed below the periodic table because of their unique physical and chemical properties.
F-block
Actinides comprise of atomic number 90-103. They are placed at bottom of periodic table.
Rare Earth elements or lanthanides are placed in the period 6 of the periodic table of Mendeleev. Actinoids are placed in the period 7 of the periodic table of Mendeleev.
At the bottom of the Periodic Table
they are not placed from elements 57-70.
Lanthanides and actinides are the two groups that are usually removed from the main body of the periodic table and placed below it to conserve space.
Lanthanides (elements with atomic number 57-71) and actinides (elements with atomic number 89 to 103) are placed at the bottom of the periodic table.
In the periodic table :)
The periodic table of elements is a chart that organizes the elements and emphasizes their shared traits and commonalities. All the known elements and their atomic number are on the periodic table.
actinides are the group of elements in the periodic table,see..........